Events build.before and build.after don't work anymore?

[kaipahl]

I tried to listen to the build.before and build.after events, but without success.

Counterintuitively the only event triggered after building the slide seems to be move.after ( as mentioned in #537 ).

Looking with breakpoints, mount jumps into Build.mount() and starts to emit the event build.before, which triggers a jump to Move.make() and this leads later to the triggering of move.after. But for some reason u can listen to move.after, but not build.before.